Relay



W. F. KRAUTTER,

LELAY.

APPLICATION FILED MAR. 27, 1919.

1 ,330, 1 24. Patented Feb. 10,1920;

' Wa -M f. M

UNITED STATES PATENT oFFIo -WILLIAM F. KRAUTTER, OF CHICAGO, ILLINOIS,ASSIGNOR TO INTERNATIONAL TIME RECORDING CQMPAN Y 015 NEW YORK, ACORPORATION OF NEW YORK.

RELAY.

Specification of Letters Patent.

Patented Feb. 10, 1920.

Application filed March 27, 1919. Serial No. 285,456. j

To all whom it may concern:

Be it known that I, WILLIAM F. KRAUTTER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Relays, of which thefollowing is a full, clear, and exact description.

In certain electrical systems it is necessary that a series of operatingimpulses sent through the controlled apparatus through theinstrumentality of a relay operated on a line carrying a current offixed direction or even one the direction of which is not subject tocontrol, should be alternately positive and negative or in other wordsthe direction of successive impulses should be alternately in oppositedirections.

I have devised an apparatus by means of which this result may beaccomplished in a simple and effective manner, and such apparatus isillustrated in the partly diagrammatic drawing which is hereto annexed.

In this drawing A designates the magnet of a relay connected up in aline circuit B, and arranged to attract when energized a springretracted armature C.

This armature carries a contact arm D,

' adapted to be brought by the action of the magnet into contact with aspring or stop E and to thereby close the circuit of a local battery Fover wires G, H, I and J leading to any controlled mechanism requiringfor its operation current impulses of alternately opposite direction,and through a pole changing device. a

The pole changing device consists essentially of two contact sprin s K,L, connected by one wire as G with t e contact arm D and by it when inengagement with stop E with the positive pole of the local battery F.These springs are suitably held by an insulating support in line withand proximity to springs M, N, beyond which are two spring stops 0, P. Aratchet wheel Q is mounted below the abovedescribed spring and with itengages a pawl R pivoted to the armature C and a. stop pawl 8.. Fast tothe shaft of the ratchet wheel Q is a gear wheel T which engages withthe pinion of a second gear 7 U, which latter engages with a pinion Vcarrying an arm W with a roller at its end. In the normal position ofthe parts tile arm W is in a horizontallposition with its roller end inengagement with and forcing back either spring M or N out of con- I tactwith' springs K or L and into contact with the outer stops 0 or P, butby the movement of armature C toward and then away from the relay magnetthe movement imparted to the gears and by these to the arm W turns thelatter through an arc of 180 degrees and shifts it from one spring N tothe other M. 7

At a given moment the positive pole of battery F is brought intoelectrical contact with arm D and thence by wire G with the spring M,which at such moment is in contact with spring 0. The current willtherefore flow from spring M to the wire I and thence to the controlledappa-- ratus, and back through wire J, spring N, sto P, with which it isin contact, and thence to I attery.

The movement of-the armature G, however, which has completed thisconnection shifts the pawl R, which on the retraction of the armatureimparts through the ratchet Q, and the gear U movement to the arm W,

which allows spring N to contact with spring L, separates springs N andP, and on the other side separates springs, K and M and brings togetherspring M and stop 0.

By this means the apparatus is left in such condition that when therelay magnet next operates the positive pole of battery F will beconnected to the wire J, and the current will return through the wire I,spring M and stop 0, and thereafter each impulse through the relaymagnet leaves a path from the positive pole of the battery througheither the wire I or the wire J, and the controlled apparatus will neverreceive two successive current impulses in the same di rection.

In the drawing a condenser X is shown connected to the local circuitaround the break to prevent sparking. This and other details notspecially described are matters well understood in the art.

What I claim is: ,1

1. In combination, a control circuit, a relay coil therein, a doublepole double throw switch having its poles biased toa predeterminedposition, a controlled circuit connected tosaid switch and whosepolarity is reversed by operation of said switch, and means controlledby said relay coil for operating said switch. i

2. In combination, a circuit, and means comprising a relay-controlledpole changer connected to said circuit for successively reversing thepolarity of the latter, said pole changer comprising a pair of movablecontacts a plurality of relatively fixed contacts, and an arm foralternately operating said movable contacts.

3. The combination with the relay magnet and its movable armature, of aratchet wheel, means connected With the armature for rotating the same,gears operated there by, a pole shifting arm-actuated by said gears,springs in the local circuit adjusted by the said arm and a pawlconnectedwith the armature and adapted to turn the ratchet on eachretracting movement of the armature.

In testimony whereof signature.

I hereunto affix my WILLIAM F. KRAUTTER.

